Lock-switch.



UNITED sTATns ...ernaar EDWARD ROSELL BlIcKINZIE, F MEMPHIS, TENNESSEE.

.the key of the proper shape and which can only be thrown in and out of operation by the use of the particular key. Y

Another object of my invention is the provision of a switch of the character mentioned which is particularly adapted for lighting purposes and which can be easily L' operated when necessary by the person having the desired key, and which will remain in locked condition except when in use for the desired purpose.

Another object of my invention is the provision of a switch of the character and for the purpose stated, which will be of simple, inexpensive and durable construction, which will occupy a small place and be of ornamental appearance, and which will be absolutely reliable and' practical in operation. With these objects in view, my invention consists of a `lock switch embodying novelv features of construction and combination of parts, substantially as shown, described and particularly defined by the claim. h

Figure 1 represents a perspective view of a complete lock switch constructed in accordance with and embodying my invention. Fig. 9./ represents a central sectional View with the operating parts of the switch shown in elevation. Fig. 3 represents a sectional view on the line 3 3 of Fig. 2; Fig. fl represeiits a sectional view on the line t-4 of Fig. 1, and Fig. lreprrsents a perspective view of the operating key.

Referring by numerals to the drawing, iny

which similar characters of reference denote corresponding parts, 1n all the views: the

numeral' 1 designates the box creasing of' my switch, which is of the proper shape and size, and has its chambered portion 2 covered by a suitable lid or cover 3, which is secured by the series of screws 4, and the box is fastened to the wall or structure by "Specification of Letters Patent.

Patented. June 3Q, 19kt.

` Application filed December 8,1913. Serial No. 805,289.

means of suitablev fastenings which pass through the openings 5 in the box. in one end of the box or casing is formed the lateral recesses 6, which receive the wings 7, formed on the sleeve 8, the said sleeve having mounted therein the key post 9, formed with '60 the key slot l, to receive the key 11, which key turns the said key post and is limited in its movement by means of the stop pins 12, which project from the disk 13, formed on the sleeve 8, abutting against the lug 9', formed upon said key. From this construction it will be observed that the key post is permitted a limited movement and can only be operated by means of the key of particu lar construction, the lock being of the character' known as Yale. or Corbin locks, each of which must be operated by a particular key adapted to the certain lock, and this forms one of the important features ot my inven tion, as it prevents the switch from being operated by other than the proper authorizedl person. The key post is formed at its upper end with an open head 14, the open portions receiving the insulating material 15, which when the switch is not in use bears-upon the spring contact arms 16, connected with the plates 17, from which lead the service the `circuit. r.Ehe contact plates 16 are in theform of curved springs being disposed at al right angle t the plates 17, and being either connected t or formed integral with the plates 17.

In normal position the parts oit my switch eeen) the relation shown in Fie. 2 and y ZD 9 when it is desired to operate the switch the key is inserted and the key post turned until the key is stopped by the pin 12, which movement brings the metalportion of the lhead in cont-act with the pair of Contact plates, thus completing the circuit and turning on the lights. If the switch is used for sounding a bell, the operation is exactly the same.

lt is evident that Iprovide a lock switch which can be instantly operated by the person having the key, which will be absolutely reliable in operation, which is very simple and inexpensive in construction, and which from every point of view will prove thoroughly ellicient and practical. l

I claim:

A lock switch of the character described, consisting of the lock'or casing having a olnunhered portion with a pair of small-vertical passages at one side thereof and hsving an enlarged circular opening with coinmunicating lateral recesses at the opposite side thereof, tubes for inclosing und protecting the service Wires arranged in the said vertical passages, a pair of transverse passages leading to seid vertical passages, binding screws passing through thetubes und engaging servlce Wires, and having heads iittin in said transverse passages, a sleeve ttmg in the circuler opening and having wings secured in the said lateral recesses, a

Menem key post mounted in said sleeve and carrying .an open heed at one end and a key receiving plate at its other end, means for limiting the movement of the key plate consisting of a pair of stop pins carried by the sleeve und adapted to be engaged by the key, curved spring contact plates secured in the casing and bearing against the open head of the key post and plates connected with the spring Contact plates at one end and having their other ends connected With the service Wires and itting in the said service Wire pro` tecting tubes.

In testimony whereof l aiiiX my signature in presence of two Witnesses.

EDWARD ROSELL MOKINZIE. Witnesses:

HEINRY BURKARD, ALBERT B. GOODWIN. 

